JPS63182296U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a half-cut front view showing an embodiment of the partial impeller of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a half-cut front view showing an example of a conventional partial impeller, and Fig. 4 is the same as shown in the attached figure. It is a side sectional view of a state. 1... Annular body, 1a... End surface, 1b... Outer circumferential tapered surface, 2... Pumping hole, 2a... Suction port,
2b...discharge port, 3...suction guide groove, 3a...bottom surface.

Claims (1)

[Claims for Utility Model Registration] (1) Penetrating an annular body that is pivotally attached to the shaft between the inner diameter portion of one end surface and the outer circumferential surface or its vicinity at an angle in the axial direction with respect to the radial direction. In a partial impeller, in which a plurality of pumping holes are equally spaced in the circumferential direction, and an opening on the inner diameter side of the one end face is an inlet and the other opening is an outlet, the one end face is provided with a hole from the inlet of each pumping hole. A partial impeller characterized in that a suction guide groove is provided that extends in the rotation direction or a similar direction toward the vicinity of an adjacent suction port. (2) The partial impeller according to claim 1, wherein the bottom surface of the suction guide groove is inclined so that it becomes deeper on the suction port side of the pumping hole.